Lewis Hamilton insisted that he has never relieved himself in his Formula 1 car.

The racing driver told The Ellen DeGeneres show that while some of the drivers can't contain themselves during what can be two-hour races, he's never been so desperate for a pee, but he also revealed a Michael Schumacher secret.

While explaining what Formula 1 was to a US audience by comparing it to Nascar, Lewis revealed that many drivers are caught short.

“You're supposed to go in your suit, but I can't do it. I've never done it. But there are drivers that do,” Lewis told Ellen.

Talking about seven-time world champion Michael Schumacher, who suffered a brain injury during a ski accident in 2013, Lewis continued: “The driver that used to drive for the team, was Michael Schumacher, I don't know if anyone's heard of him, but legend racing driver, but my mechanics told me he peed every single time he was in the car.”

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Also during his chat with Ellen, the Brit was left squirming when he was grilled about his rumoured romances with Kendall Jenner and Rihanna.

Lewis appeared on Ellen ahead of his race in Austin

MONTE CARLO, MONACO - MAY 23: Lewis Hamilton (R) of Great Britain and McLaren talks with Michael Schumacher (L) of Germany and Mercedes GP at the drivers press conference during previews to the Monaco Formula One Grand Prix at the Monte Carlo Circuit on May 23, 2012 in Monte Carlo, Monaco (Image: Getty)

The Formula 1 champion, who has been linked to model Kendall, RiRi and even Rita Ora, was grilled about his love life by Ellen on her show.

Lewis, 31, is world famous but in America, it would seem that people don't know that much about Formula 1 so during his appearance he was explaining exactly what it is. But after all that, Ellen wanted to get the important facts covered first.

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Lewis and Nicole Scherzinger, pictured here in 2014, had been together for nearly eight years (Image: Getty)

“You've been with Rihanna...” Ellen said as pictures of the pair were flashed on the screen, to which Lewis replied: “Oh really?”

Ellen quipped: “Yes you have.... Kendall Jenner and lots of people, yes, are you single now?”

Lewis, who found himself awkwardly laughing along with the show's audience, insisted that he wasn't dating but concentrating on his job.

But while Nicole Scherzinger, who dated the Brit for nearly eight years, is well known in the US, Lewis couldn't bring himself to mention the X Factor judge's name.

“I'm not. I'm not,” Lewis said, confirming his single status.

Kendall Jenner and Lewis Hamilton were linked (Image: Rex)

Rihanna

“I was in a long relationship. I was in an almost eight-year relationship. Now I'm solely focussed on my racing. I'm trying to win this championship this year, which is definitely very trying. No I don't really have any plans at the moment.”

Last year, Lewis was linked to Keeping Up With The Kardashians beauty Kendall after they spent time together in Cannes and Monaco. He was also close to Rihanna when they partied in Barbados at carnival and were linked this summer.